Title :
Miniaturization and bandwidth enhancement of a loose coupler by DGS
Author :
Bhowmik, Priyansha ; Moyra, Tamasi ; Deb, Partha Kumar
Author_Institution :
Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Agartala, India
Abstract :
A 10 dB branch line coupler with a dumbbell shaped defected ground structure (DGS) is proposed in this paper. The 150 ohm transmission line of the proposed BLC above the substrate is of much small size than the conventional due to the DGS in the ground layer. The equivalent LC circuit of the proposed 150 ohm line is obtained. The proposed 150 ohm transmission line is now used in the 10 dB branch line coupler. The proposed 10 dB coupler is now of reduced size and from the simulation result it´s seen that flatness of the response increases, in turn increasing the bandwidth.
Keywords :
LC circuits; coupled transmission lines; defected ground structures; equivalent circuits; waveguide couplers; bandwidth enhancement; branch line coupler; defected ground structure; dumbbell shaped DGS; equivalent LC circuit; ground layer; loose coupler; resistance 150 ohm; transmission line; Bandwidth; Couplers; Impedance; Ports (Computers); Power transmission lines; Signal processing; Substrates; 10 dB branch line coupler; BLC; DGS; branch line coupler; defected ground structure;
Conference_Titel :
Signal Processing and Integrated Networks (SPIN), 2015 2nd International Conference on
Conference_Location :
Noida
Print_ISBN :
978-1-4799-5990-7
DOI :
10.1109/SPIN.2015.7095278
